noes

$meta_query = array(
	'relation' => 'AND',
	array(
		'key'     => 'area',
		'value'   => '$area',
		'compare' => '=',
	),
	array(
		'key'     => 'volumen',
		'value'   => '$vol',
		'compare' => '=',
	),
	array(
		'key'     => 'tipos',
		'value'   => '$tip',
		'compare' => '=',
	),
	array(
		'key'     => 'modalidad',
		'value'   => '$mod',
		'compare' => '=',
	),
	array(
		'key'     => 'audiencia',
		'value'   => '$aud',
		'compare' => '=',
	),
);